炭素鋼配管の使用温度
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海友の皆さん、20#鋼の最低使用温度はいくらですか？ありがとうございます！:)
GB8163規格における20番鋼管は0度です
GB/T150ではGB/T8163は0度と規定されており、GB/T50316の使用温度下限は-20度、GB/T20801では厚さによって-20度を超えることもある
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